I noticed the other day that my injectore was leaking, i got o rings replaced those and they were leaking even more. So i found a crack in two of the injectors. Replaced those two and made sure they were all seated properly. Go to start it up and it doesn't idle worth crap. I checked all of the wires to the distributor and they are all getting spark. In the process of changing the fuel injectors i broke off the vaccuum line to the throttle body from the electrical connecgtion above it. Could this be the cause of my idling rough. Please help as i have to get the jeep on the road.

1990 4.0

 

vac lines suck and there is a likelyhood that it is the problem. you can do a vac line delete for most of em. there are some threads. get that vac line fixed and go from there. i made the mistake of not being methodical enough. i spent/wasted a fair amount of money just chasing this "gremlin". and it just cost over 100/ea. for my new o2 sensors. but its good now...

 

can you put a pic up of whats broke,

 

This i think

 

please help

 

does it go to this box in the back ov valve cover, disregard the red arrow

 

yes it does that is the exact one

 

im un clear where you broke it and the vacuum line or the electrial connector can you show on my pioc or yours

 

the line all the way to the left on that switch right there is broken. It is broke right off of the throttle body and is broke right before that little bookt on the line that you can see in the picture

 

wherer it broke on the throttle body is there any thing sticking out to push a small hose on to like wind shield wassher hose or is it broke off clean

 

its broken off flush. I tried to put a hose on it but it was so brittle it just broke off when i tried to.

 

the map sensor does not have to get vacuum from there only as long as theres a vacuum supply to it it will work tee into the bigger line above it iin you pic and plug the other end untill you can get a new line

 

Well that vac line going to the MAP sensor will cause a really rough idle if broken. There isn't anything that can be broken off on the throttle body that is vacuum related, the vac hose itself has a rubber grommet that goes inside the throttle body. If the broken section of vac line can't be replaced with some rubber hose, then i would try and find another map sensor vac line from a 1987-1990 cherokee.

 

wait, so tee it into another vacuum line for now?

 

yes and plug the hole in the gromeet in the throttle body